Elementary principles of drill jigs, by E.R. Markham.--Drilling jig plates, by J.R. Gordon.--Examples of drill jigs.--Dimensions of standard jig bushings.--Using jigs to best advantage, by B.P. Fortin and J.F. Mirrielees
Copyright-evidenceEvidence reported by ian white for item drilljigs00markrich on February 2, 2007: visible notice of copyright; stated date is 1913.